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CIDR Range

138.153.0.0/16

65.5K IPs /16 United States ARIN
Addresses
65,536
65.5K
Sub-ranges
26+
within this block
PTR Density
0.0%
0 of 65.5K IPs have PTR

Reputation · trust score

A transparent 0–100 signal. Every entity starts at a neutral baseline of 65; threat-intel blocklists, exposure, reverse-DNS, routing and allocation each adjust it up or down. Higher is more trustworthy.

65/100
Moderate
How this score is built

Experimental · trust-vectors model v1.3.0 — a transparent heuristic, not a definitive verdict. How it works →

Ranges inside 138.153.0.0/16

CIDRIPsOrganizationASNCountry
138.153.128.0/17 32.8K United States Department of Defense DoD AS721 US
138.153.128.0/17 32.8K United States Department of Defense DoD AS721 US
138.153.0.0/18 16.4K United States Department of Defense DoD AS721 US
138.153.0.0/18 16.4K United States Department of Defense DoD AS721 US
138.153.64.0/19 8.2K United States Department of Defense DoD AS5852 US
138.153.64.0/19 8.2K United States Department of Defense DoD AS5852 US
138.153.112.0/21 2.0K United States Department of Defense DoD AS721 US
138.153.112.0/21 2.0K United States Department of Defense DoD AS721 US
138.153.104.0/21 2.0K United States Department of Defense DoD AS721 US
138.153.104.0/21 2.0K United States Department of Defense DoD AS721 US
138.153.100.0/22 1.0K United States Department of Defense DoD AS5852 US
138.153.100.0/22 1.0K United States Department of Defense DoD AS5852 US
138.153.124.0/22 1.0K United States Department of Defense DoD AS721 US
138.153.124.0/22 1.0K United States Department of Defense DoD AS721 US
138.153.122.0/23 512 United States Department of Defense DoD AS721 US
138.153.122.0/23 512 United States Department of Defense DoD AS721 US
138.153.98.0/23 512 United States Department of Defense DoD AS721 US
138.153.98.0/23 512 United States Department of Defense DoD AS721 US
138.153.120.0/24 256 United States Department of Defense DoD AS721 US
138.153.121.0/24 256 United States Department of Defense DoD AS5852 US
138.153.121.0/24 256 United States Department of Defense DoD AS5852 US
138.153.96.0/24 256 United States Department of Defense DoD AS721 US
138.153.97.0/24 256 United States Department of Defense DoD AS5852 US
138.153.97.0/24 256 United States Department of Defense DoD AS5852 US
138.153.96.0/24 256 United States Department of Defense DoD AS721 US
138.153.120.0/24 256 United States Department of Defense DoD AS721 US

Geolocation

First and last addresses in 138.153.0.0/16

138.153.0.0/16 runs from 138.153.0.0 to 138.153.255.255.

First 16
Last 16

Not announced as an exact prefix — covered by the announced supernet 138.144.0.0/12.

Announced prefix
Origin AS
Announcement samples
21,731
Last seen
2026-11-05 22:59:58

RIR Ownership History

Atom feed ⇲

Allocation changes captured from regional internet registry (RIR) delegation files, re-imported every six hours.

Date Event From To
2026-05-10 New Allocation — US

Frequently Asked Questions

What is 138.153.0.0/16?

138.153.0.0/16 is a CIDR network block containing 65,536 IPv4 addresses (from 138.153.0.0 to 138.153.255.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.

Who owns the 138.153.0.0/16 network?

The 138.153.0.0/16 range is allocated to an unknown organization from United States.

Last updated: 2026-11-05 23:09:05 UTC
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